diff options
author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
---|---|---|
committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c b/ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c deleted file mode 100644 index 83611879..00000000 --- a/ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c +++ /dev/null @@ -1,354 +0,0 @@ -/* - * An SPI driver for the Philips PCF2123 RTC - * Copyright 2009 Cyber Switching, Inc. - * - * Author: Chris Verges <chrisv@cyberswitching.com> - * Maintainers: http://www.cyberswitching.com - * - * based on the RS5C348 driver in this same directory. - * - * Thanks to Christian Pellegrin <chripell@fsfe.org> for - * the sysfs contributions to this driver. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Please note that the CS is active high, so platform data - * should look something like: - * - * static struct spi_board_info ek_spi_devices[] = { - * ... - * { - * .modalias = "rtc-pcf2123", - * .chip_select = 1, - * .controller_data = (void *)AT91_PIN_PA10, - * .max_speed_hz = 1000 * 1000, - * .mode = SPI_CS_HIGH, - * .bus_num = 0, - * }, - * ... - *}; - * - */ - -#include <linux/bcd.h> -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/rtc.h> -#include <linux/spi/spi.h> -#include <linux/module.h> - -#define DRV_VERSION "0.6" - -#define PCF2123_REG_CTRL1 (0x00) /* Control Register 1 */ -#define PCF2123_REG_CTRL2 (0x01) /* Control Register 2 */ -#define PCF2123_REG_SC (0x02) /* datetime */ -#define PCF2123_REG_MN (0x03) -#define PCF2123_REG_HR (0x04) -#define PCF2123_REG_DM (0x05) -#define PCF2123_REG_DW (0x06) -#define PCF2123_REG_MO (0x07) -#define PCF2123_REG_YR (0x08) - -#define PCF2123_SUBADDR (1 << 4) -#define PCF2123_WRITE ((0 << 7) | PCF2123_SUBADDR) -#define PCF2123_READ ((1 << 7) | PCF2123_SUBADDR) - -static struct spi_driver pcf2123_driver; - -struct pcf2123_sysfs_reg { - struct device_attribute attr; - char name[2]; -}; - -struct pcf2123_plat_data { - struct rtc_device *rtc; - struct pcf2123_sysfs_reg regs[16]; -}; - -/* - * Causes a 30 nanosecond delay to ensure that the PCF2123 chip select - * is released properly after an SPI write. This function should be - * called after EVERY read/write call over SPI. - */ -static inline void pcf2123_delay_trec(void) -{ - ndelay(30); -} - -static ssize_t pcf2123_show(struct device *dev, struct device_attribute *attr, - char *buffer) -{ - struct spi_device *spi = to_spi_device(dev); - struct pcf2123_sysfs_reg *r; - u8 txbuf[1], rxbuf[1]; - unsigned long reg; - int ret; - - r = container_of(attr, struct pcf2123_sysfs_reg, attr); - - if (strict_strtoul(r->name, 16, ®)) - return -EINVAL; - - txbuf[0] = PCF2123_READ | reg; - ret = spi_write_then_read(spi, txbuf, 1, rxbuf, 1); - if (ret < 0) - return -EIO; - pcf2123_delay_trec(); - return sprintf(buffer, "0x%x\n", rxbuf[0]); -} - -static ssize_t pcf2123_store(struct device *dev, struct device_attribute *attr, - const char *buffer, size_t count) { - struct spi_device *spi = to_spi_device(dev); - struct pcf2123_sysfs_reg *r; - u8 txbuf[2]; - unsigned long reg; - unsigned long val; - - int ret; - - r = container_of(attr, struct pcf2123_sysfs_reg, attr); - - if (strict_strtoul(r->name, 16, ®) - || strict_strtoul(buffer, 10, &val)) - return -EINVAL; - - txbuf[0] = PCF2123_WRITE | reg; - txbuf[1] = val; - ret = spi_write(spi, txbuf, sizeof(txbuf)); - if (ret < 0) - return -EIO; - pcf2123_delay_trec(); - return count; -} - -static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm) -{ - struct spi_device *spi = to_spi_device(dev); - u8 txbuf[1], rxbuf[7]; - int ret; - - txbuf[0] = PCF2123_READ | PCF2123_REG_SC; - ret = spi_write_then_read(spi, txbuf, sizeof(txbuf), - rxbuf, sizeof(rxbuf)); - if (ret < 0) - return ret; - pcf2123_delay_trec(); - - tm->tm_sec = bcd2bin(rxbuf[0] & 0x7F); - tm->tm_min = bcd2bin(rxbuf[1] & 0x7F); - tm->tm_hour = bcd2bin(rxbuf[2] & 0x3F); /* rtc hr 0-23 */ - tm->tm_mday = bcd2bin(rxbuf[3] & 0x3F); - tm->tm_wday = rxbuf[4] & 0x07; - tm->tm_mon = bcd2bin(rxbuf[5] & 0x1F) - 1; /* rtc mn 1-12 */ - tm->tm_year = bcd2bin(rxbuf[6]); - if (tm->tm_year < 70) - tm->tm_year += 100; /* assume we are in 1970...2069 */ - - dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, " - "mday=%d, mon=%d, year=%d, wday=%d\n", - __func__, - tm->tm_sec, tm->tm_min, tm->tm_hour, - tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); - - /* the clock can give out invalid datetime, but we cannot return - * -EINVAL otherwise hwclock will refuse to set the time on bootup. - */ - if (rtc_valid_tm(tm) < 0) - dev_err(dev, "retrieved date/time is not valid.\n"); - - return 0; -} - -static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm) -{ - struct spi_device *spi = to_spi_device(dev); - u8 txbuf[8]; - int ret; - - dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, " - "mday=%d, mon=%d, year=%d, wday=%d\n", - __func__, - tm->tm_sec, tm->tm_min, tm->tm_hour, - tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); - - /* Stop the counter first */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x20; - ret = spi_write(spi, txbuf, 2); - if (ret < 0) - return ret; - pcf2123_delay_trec(); - - /* Set the new time */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_SC; - txbuf[1] = bin2bcd(tm->tm_sec & 0x7F); - txbuf[2] = bin2bcd(tm->tm_min & 0x7F); - txbuf[3] = bin2bcd(tm->tm_hour & 0x3F); - txbuf[4] = bin2bcd(tm->tm_mday & 0x3F); - txbuf[5] = tm->tm_wday & 0x07; - txbuf[6] = bin2bcd((tm->tm_mon + 1) & 0x1F); /* rtc mn 1-12 */ - txbuf[7] = bin2bcd(tm->tm_year < 100 ? tm->tm_year : tm->tm_year - 100); - - ret = spi_write(spi, txbuf, sizeof(txbuf)); - if (ret < 0) - return ret; - pcf2123_delay_trec(); - - /* Start the counter */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x00; - ret = spi_write(spi, txbuf, 2); - if (ret < 0) - return ret; - pcf2123_delay_trec(); - - return 0; -} - -static const struct rtc_class_ops pcf2123_rtc_ops = { - .read_time = pcf2123_rtc_read_time, - .set_time = pcf2123_rtc_set_time, -}; - -static int __devinit pcf2123_probe(struct spi_device *spi) -{ - struct rtc_device *rtc; - struct pcf2123_plat_data *pdata; - u8 txbuf[2], rxbuf[2]; - int ret, i; - - pdata = kzalloc(sizeof(struct pcf2123_plat_data), GFP_KERNEL); - if (!pdata) - return -ENOMEM; - spi->dev.platform_data = pdata; - - /* Send a software reset command */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x58; - dev_dbg(&spi->dev, "resetting RTC (0x%02X 0x%02X)\n", - txbuf[0], txbuf[1]); - ret = spi_write(spi, txbuf, 2 * sizeof(u8)); - if (ret < 0) - goto kfree_exit; - pcf2123_delay_trec(); - - /* Stop the counter */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x20; - dev_dbg(&spi->dev, "stopping RTC (0x%02X 0x%02X)\n", - txbuf[0], txbuf[1]); - ret = spi_write(spi, txbuf, 2 * sizeof(u8)); - if (ret < 0) - goto kfree_exit; - pcf2123_delay_trec(); - - /* See if the counter was actually stopped */ - txbuf[0] = PCF2123_READ | PCF2123_REG_CTRL1; - dev_dbg(&spi->dev, "checking for presence of RTC (0x%02X)\n", - txbuf[0]); - ret = spi_write_then_read(spi, txbuf, 1 * sizeof(u8), - rxbuf, 2 * sizeof(u8)); - dev_dbg(&spi->dev, "received data from RTC (0x%02X 0x%02X)\n", - rxbuf[0], rxbuf[1]); - if (ret < 0) - goto kfree_exit; - pcf2123_delay_trec(); - - if (!(rxbuf[0] & 0x20)) { - dev_err(&spi->dev, "chip not found\n"); - goto kfree_exit; - } - - dev_info(&spi->dev, "chip found, driver version " DRV_VERSION "\n"); - dev_info(&spi->dev, "spiclk %u KHz.\n", - (spi->max_speed_hz + 500) / 1000); - - /* Start the counter */ - txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1; - txbuf[1] = 0x00; - ret = spi_write(spi, txbuf, sizeof(txbuf)); - if (ret < 0) - goto kfree_exit; - pcf2123_delay_trec(); - - /* Finalize the initialization */ - rtc = rtc_device_register(pcf2123_driver.driver.name, &spi->dev, - &pcf2123_rtc_ops, THIS_MODULE); - - if (IS_ERR(rtc)) { - dev_err(&spi->dev, "failed to register.\n"); - ret = PTR_ERR(rtc); - goto kfree_exit; - } - - pdata->rtc = rtc; - - for (i = 0; i < 16; i++) { - sprintf(pdata->regs[i].name, "%1x", i); - pdata->regs[i].attr.attr.mode = S_IRUGO | S_IWUSR; - pdata->regs[i].attr.attr.name = pdata->regs[i].name; - pdata->regs[i].attr.show = pcf2123_show; - pdata->regs[i].attr.store = pcf2123_store; - ret = device_create_file(&spi->dev, &pdata->regs[i].attr); - if (ret) { - dev_err(&spi->dev, "Unable to create sysfs %s\n", - pdata->regs[i].name); - goto sysfs_exit; - } - } - - return 0; - -sysfs_exit: - for (i--; i >= 0; i--) - device_remove_file(&spi->dev, &pdata->regs[i].attr); - -kfree_exit: - kfree(pdata); - spi->dev.platform_data = NULL; - return ret; -} - -static int __devexit pcf2123_remove(struct spi_device *spi) -{ - struct pcf2123_plat_data *pdata = spi->dev.platform_data; - int i; - - if (pdata) { - struct rtc_device *rtc = pdata->rtc; - - if (rtc) - rtc_device_unregister(rtc); - for (i = 0; i < 16; i++) - if (pdata->regs[i].name[0]) - device_remove_file(&spi->dev, - &pdata->regs[i].attr); - kfree(pdata); - } - - return 0; -} - -static struct spi_driver pcf2123_driver = { - .driver = { - .name = "rtc-pcf2123", - .owner = THIS_MODULE, - }, - .probe = pcf2123_probe, - .remove = __devexit_p(pcf2123_remove), -}; - -module_spi_driver(pcf2123_driver); - -MODULE_AUTHOR("Chris Verges <chrisv@cyberswitching.com>"); -MODULE_DESCRIPTION("NXP PCF2123 RTC driver"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_VERSION); |